//#include <TPTypedef.h>

#include <string.h>
#include "md5_encode.h"

/******************************************************************************
* Manifest Constants
*******************************************************************************/
/* "TPSD KUpd ateM agic" */
#define MD5_INIT_MAGIC_0 (unsigned long)0x67452301L
#define MD5_INIT_MAGIC_1 (unsigned long)0xefcdab89L
#define MD5_INIT_MAGIC_2 (unsigned long)0x98badcfeL
#define MD5_INIT_MAGIC_3 (unsigned long)0x10325476L

/* Constants for MD5Transform routine.*/
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

/******************************************************************************
* Typedefs
*******************************************************************************/



typedef struct _MD5Context
{
  uint32 state[4];/* state (ABCD) */
  uint32 count[2];/* number of bits, modulo 2^64 (lsb first) */
  uint8  buffer[64];/* input buffer */
} ST_MD5Context;

/******************************************************************************
* Macros
*******************************************************************************/
/* F, G, H and I are basic MD5 functions.*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/*
*  FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
*  Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) {\
(a)+=(F((b), (c), (d)) + (x) + (uint32)(ac));(a)= ROTATE_LEFT((a),(s)); (a)+=(b);}

#define GG(a, b, c, d, x, s, ac) {\
(a) += (G((b), (c), (d)) + (x) + (uint32)(ac));(a) = ROTATE_LEFT ((a), (s)); (a) += (b);}

#define HH(a, b, c, d, x, s, ac) {\
(a) += (H((b), (c), (d)) + (x) + (uint32)(ac));(a) = ROTATE_LEFT ((a), (s)); (a) += (b);}

#define II(a, b, c, d, x, s, ac) {\
(a) += (I((b), (c), (d)) + (x) + (uint32)(ac));(a) = ROTATE_LEFT ((a), (s)); (a) += (b);}


/******************************************************************************
* Constants
*******************************************************************************/
static const uint8 PADDING[64] =
{
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


/******************************************************************************
* Private Functions
*******************************************************************************/
/* Encodes input (UINT4) into output (unsigned char). Assumes len is
  a multiple of 4.
 */
static void
md5_encode(uint8*        output,
           const uint32* input,
           uint32        len)

{
    uint32 i, j;

    for (i = 0, j = 0; j < len; i++, j += 4)
    {
        output[j]   = (uint8)(input[i] & 0xff);
        output[j+1] = (uint8)((input[i] >> 8) & 0xff);
        output[j+2] = (uint8)((input[i] >> 16) & 0xff);
        output[j+3] = (uint8)((input[i] >> 24) & 0xff);
  }
}


/* Decodes input (unsigned char) into output (UINT4). Assumes len is
  a multiple of 4.
 */
static void
md5_decode(uint32*       output,
           const uint8*  input,
           uint32        len)

{
    uint32 i, j;

    for (i = 0, j = 0; j < len; i++, j += 4)
    {
        output[i] = ((uint32)input[j]) | (((uint32)input[j + 1]) << 8) |
                    (((uint32)input[j + 2]) << 16) | (((uint32)input[j + 3]) << 24);
    }
}


/* MD5 basic transformation. Transforms state based on block.
 */
static void
md5_transform(uint32      state[4],
              const uint8 block[64])

{
    uint32 a = state[0], b = state[1], c = state[2], d = state[3], x[16];

    md5_decode(x, block, 64);

    /* Round 1 */
    FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
    FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
    FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
    FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
    FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
    FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
    FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
    FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
    FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
    FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
    FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
    FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
    FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
    FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
    FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
    FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */

    /* Round 2 */
    GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
    GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
    GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
    GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
    GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
    GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
    GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
    GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
    GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
    GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
    GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
    GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
    GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
    GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
    GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
    GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */

    /* Round 3 */
    HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
    HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
    HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
    HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
    HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
    HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
    HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
    HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
    HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
    HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
    HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
    HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
    HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
    HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
    HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
    HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */

    /* Round 4 */
    II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
    II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
    II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
    II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
    II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
    II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
    II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
    II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
    II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
    II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
    II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
    II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
    II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
    II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
    II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
    II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */

    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;

    /* Zeroize sensitive information*/
    memset((void*)x, 0, sizeof(x));
}

/******************************************************************************
* Protected Functions
*******************************************************************************/
/* MD5 initialization. Begins an MD5 operation, writing a new context.
 */
void
tp_md5_init(ST_MD5Context* context)
                                        /* context */
{
  context->count[0] = context->count[1] = 0;

  /* Load magic initialization constants.*/
  context->state[0] = MD5_INIT_MAGIC_0;
  context->state[1] = MD5_INIT_MAGIC_1;
  context->state[2] = MD5_INIT_MAGIC_2;
  context->state[3] = MD5_INIT_MAGIC_3;
}


/* MD5 block update operation. Continues an MD5 message-digest
  operation, processing another message block, and updating the
  context.
 */
void
tp_md5_update(ST_MD5Context* context,
              const uint8* input,
              uint32 inputLen)
/* context */
/* input block */
/* length of input block */
{
  uint32 i, index, partLen;

  /* Compute number of bytes mod 64 */
  index = (uint32)((context->count[0] >> 3) & 0x3F);

  /* Update number of bits */
  if ((context->count[0] += ((uint32)inputLen << 3)) <
      ((uint32)inputLen << 3))
  {
     context->count[1]++;
  }
  context->count[1] += ((uint32)inputLen >> 29);

  partLen = 64 - index;

  /* Transform as many times as possible. */
  if (inputLen >= partLen)
  {
      memcpy((void*)&context->buffer[index],
             (void*)input,
             partLen);
      md5_transform(context->state, context->buffer);

      for (i = partLen; (i + 63) < inputLen; i += 64)
      {
          md5_transform(context->state, &input[i]);
      }

      index = 0;
  }
  else
  {
     i = 0;
  }

  /* Buffer remaining input */
  memcpy((void*)&context->buffer[index],
         (void*)&input[i],
         inputLen - i);
}


/* MD5 finalization. Ends an MD5 message-digest operation, writing the
  the message digest and zeroizing the context.
 */
void
tp_md5_final(uint8 digest[16], ST_MD5Context* context)
{
  uint8 bits[8];
  uint32 index, padLen;

  /* Save number of bits */
  md5_encode(bits, context->count, 8);

  /* Pad out to 56 mod 64.*/
  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
  padLen = (index < 56) ? (56 - index) : (120 - index);
  tp_md5_update(context, (uint8*)PADDING, padLen);

  /* Append length (before padding) */
  tp_md5_update(context, bits, 8);
  /* Store state in digest */
  md5_encode(digest, context->state, 16);

  /* Zeroize sensitive information.
*/
  memset((void*)context, 0, sizeof(ST_MD5Context));
}


void
tp_md5_all(uint8        digest[16],
           const uint8* input,
           uint32       inputLen)
{
    ST_MD5Context context;
    uint32        remainBytes;
    uint32        readedBytes;
    uint32        readBytes;

    tp_md5_init(&context);

    readedBytes = 0;
    remainBytes = inputLen;
    while (remainBytes > 0)
    {
        if (remainBytes > 1024)
        {
            readBytes = 1024;
        }
        else
        {
            readBytes = remainBytes;
        }

        tp_md5_update(&context, (uint8*)(input + readedBytes), readBytes);

        readedBytes += readBytes;
        remainBytes -= readBytes;
    }

    tp_md5_final(digest, &context);
}


#if 0

/* Digests a string and prints the result.
 */
char* MDString (char *string)

{
  MD5_CTX context;
  unsigned char digest[16];
  char output1[32];
 static  char output[33]={""};
  unsigned int len = strlen (string);
  int i;
  MD5Init (&context);
  MD5Update (&context, (unsigned char*)string, len);
  MD5Final (digest, &context);

  for (i = 0; i < 16; i++)
 {sprintf(&(output1[2*i]),"%02x",(unsigned char)digest[i]);
  sprintf(&(output1[2*i+1]),"%02x",(unsigned char)(digest[i]<<4));
  }
  for(i=0;i<32;i++)
  output[i]=output1[i];
  return output;
}


/* Digests a file and prints the result.
 */
char* MDFile (char *filename)

{ static char output[33]={""};
  FILE *file;
  MD5_CTX context;
  int len;
  unsigned char buffer[1024], digest[16];
  int i;
  char output1[32];
  if ((file = fopen (filename, "rb")) == NULL)
   { printf ("%s can't be openedn", filename);
    return 0;
   }
  else {
       MD5Init (&context);
     while (len = fread (buffer, 1, 1024, file))
       MD5Update (&context, buffer, len);
    MD5Final (digest, &context);
    fclose (file);
    for (i = 0; i < 16; i++)
     {sprintf(&(output1[2*i]),"%02x",(unsigned char)digest[i]);
        sprintf(&(output1[2*i+1]),"%02x",(unsigned char)(digest[i]<<4));
          }
        for(i=0;i<32;i++)
       output[i]=output1[i];
        return output;
       }
}
#endif
